Often misquoted from Tennyson's "Charge of the Light Brigade" are the words "Ours is not to question why..." Actually, the poet does not say "our is" or "ours" but "Theirs not to question why." Don't ask me why I know this.

(Another famous quote misquoted all the time is "Hoist on his own petard," wherein the speaker thinks a petar(d) is a flagpole or mast. Petar is Elizabethan for bomb, hoist meant blown up, and the quote is "... hoist by his own petar."

"A little learning is a dangerous thing.Drink deep or taste not the Pierian Spring." --- Pope

I suppose most of us just sipped at that spring, unlike Alexander Pope who must have managed deep draughts.